Sheet-metal-bending machine.



G T, TARENNNG, SHEET METAL BENEHNG Mmmm. APPLICATION FLED FEB 17,1914.

teme@ Feb. 2, 1915..

is f i.; bis i 'BEES T.

Men-iening ii'ieciaigles, Wheis he 'Sei lowing is e specification. v

This invention misi-es ie machile fm: bending sheet metfgi7 @to ferm, rifise mi gutters.' and .f'aiievs used '35er Teefrg; nur? poses, and is an imnmvemen: en my U. Ci. Letters Patent No. 27g-1,519, isseii. April if? i903. f

The obiec of zhe invenion eens-isis in ile provision mi a machine of fthe above ehem@ 'ier in which the gregxesi fome is @implied n the eimning jaws whes {he isie brought direciv im@ f :eniec W'h che Itempe of the machine.

A ufher obiec like inventief@ is "povide n machine si she shove wiierebv diieren; e'rms in sheet me si mmf be p rmiuceii, ami wherebv ssici mefmi :my be uniformly mei eccrateiv formeel. for th preigoses fm1 which he same is iniemieci,

'gi' nccompiisil.. the above obiects of Ene in ve'nien bv means of tileevice iiiusmed in is u @teile the :meenmanving `v-lrswixngs, iermng e eem hereof. in Which- 'figzme i is n 'fragmentary fieissi View in sie elevation of the from and :igiiium emi ef the machine im benciine; sheeI messi.. Fig. 2 is n cross section on ixe ii'ne 2-55 in Fig. l. Fig. 3 is a view simile?" so Fig. 2 except that the pests have been meveci te sie end (if-their inward travel in foi-ming 51e metai shee. 4 is e fietnii in cross sec- 'ion ml'ixe line iw-4 in i.

Referring' ie the di'awings, iixe machine comprises a frame in which i@ represents im end memive. mie e? which is ewsngefi si', each emi of the machine. he tw@ @mi bers being nelci in Tifli 'reniien iov ma of ihe cennecting beams smi ii-11 rm'xge immc-inieiy seiow emi seeiwe te the beam ll bv means ef suisbie "bffs A die tenmiet 16, Ene fsrmeigien @if Whisk pm'ts "cine vurimis desizeei euri. te ilse :'netsi 41e be bent. A rensverss '-Jiv he tempie-1; is shown in figs. 2 upon 'ibis style of a iemnie sige veifs roofing pmpeses are produced. n" I; ins Wh tempi i .e moves-lf2 e" i Spsceation of Estant.

saving e. cie/pression therein corresponding 1o 531e exteiior fermntion of *lle ediacent face 0f the emniet 1G. The barlS is suitneiv snppmieci iw menus of a Diuraiiy of jy'eke's E9. imei hese vokes form seais for he 60 heks Si sieri sjocks 2l 'me secured to ine 'beis 'the fermer presiding housings for zile amfricien miiers E22 which in tum. bear @games the empherles of the which eine arranged iwan, tbelnnin drive shaft 2li. and hese cesse srovicie the menus iff 'Wixicil the pisseuse-bm 18 is moved against the isser sciiseeet smnce of the em'eiet ilz. These 'cams have su'iieient 'and p'eonged high passions so move and hold 70 due pessureber T18 against the tempie-Qt i@ te 'farce 'ne sixee; metni inte the depreseine he .ffice ei seid bar and to continue v is firm?? heid tile seid metai sheet against eine iemnie during the remaining eperatinn of bending he sheet metni againsi the side feces of the empie; i. The edusment of eige ber E8 with respect i0 the tempiet i6, 'so mener es'ismties may be Secured and msinininee. is effeee by means of the'lbnits 80 5&0 ami the leck- 's, 25. The free ends of the menshee sie bent to conform io ghe lregumriies he sles of the temwlet viie supports move the :mns 3i piaies 3Q" and by' ineens of the ged m iie firms 3i and e'ss of the arms and supiii, te very., seguinte ami; fesireci ihres* e? jiie die pistes e igogzg'ies for minimizing ":he arms 3 1 fer 'moving he ie pistes 30 fir/'einst che 105 of che liempiet i@ comprise two connectie; imis fiel, the fermer pivot sy #i tie svg-aeree 55 es 43 and' the which is ecfieci on sich siaie of ehe tempiet 85 emmeeed ie the arms 31 :it 34. 95

. srmpers 33. ne distance 100 latter pivotally engaging the ears (t4 which are formed integrally with the connecting beam 12 of the frame of the machine.

lWhen the parts occupy the position shown in Fig. 2, which is the open osition of the machine and which allows tie metal sheet Ell) to be inserted into the machine, as shown,

the movable parts may be elevated into the p sition shown in Fig. 3, to crimp the metal .et around the exterior surfaceof the tempiet 16, by means of a pair of cams G and 51 ich are secured tothe main Shaft 24. 'laese cams operate the connecting arms 53 and 54 which engage the toggles at 55, the cams 50 and 51 being arranged on the main shaft 24e to simultaneously move the connecting arms and 54 inwardly at each revolu'- tion of the cams 50 and 51. The use of toggies for raising the arms 31 and the die plates 30, enables a 'gradually increasing application of power to be applied against the die plate until the links of the toggles more nearly approach a straight line, thereby enabling the greatest pressure to be applied at the time the die plates 30 are in contact with and in the final act of bending the metal sheet around the irregular external surface of the templet 16. This construction has a decided advantxge over the one heretofore used by me, in which the arms 31 and'die plates 30 are actuated by of cams, wherein the amount of rted increases .on the approach ot ai est radii oi.' the cams, but which be maintained during the 0pnping the remaining portion meets caused by the decrease in lli ci.' the cams as they continue to the us" i .ie n'iaehine may be driven by any suit- .e means tor applying power to the main drive sha ft Q4, and, for convenience, l have shown a pulley (i0 rotated. by a beltGl; and by means of the clutch G2 of any preferred type, which clutch is actuated by means of a handlever (35i, the rotating parts may be thrown into and out ot operation when desired.

fThe standard length Aof galvanized iron ten feet, and the machine is made of a ic.lg'';h to enable material of the above-mei1- tionefl length to be fed. therein. As shown in Fig. 3 oi the drawings, a suitable gage 70 provided to limit and regulate 'the insel'- tion ci the metal sheets, so that th'e templet wiil always come into contact with the center 'of `the sheets. After a sheet of metal has be n bent `into the desired. form and the die ,dates 30 are in their lowest position, ast

plates 30, which have a rhythmical intermittent stroke, a vast amount of accurately and uniformly inished product can be produced within a limited period of time.

Having thusiully described my said invention, what I desire to secure by Letters Patent," is

1. In a bending machine, the combination with .the main frame, of a templct arranged in Said frame, a pressure-bar arranged bef neath and for holding the metal sheets against the templet, means for moving said prcssure-bar into contact with said templet, means for regulating the movement of the pressure-bar toward the templet, a pair of swinging jaws arrangcd'to coperate with said templet, toggles for the jaws, means for changing th'e position of the jaws with respect to the toggles, and means for actuating said toggles.

2. In a bending machine, the combination with. the main frame, of a templet'arranged in said frame, a pressure-bar arranged be` neath and for holding the metal sheets against the templet, means for moving said pressure-bar into contact with said templet, a pair of swinging jaws arranged to coperate with said tcmplet, a pair of toggles `for raising the jaws into contact with said templet, means independent of the toggles for regulating the tra'vel of said jaws, and

means for actuating said toggles.

3. In o, bending machine, the combination with the main frame, of a templct rigidly secured in sald'irame, a pressure-bar arranged beneath to coperate with said tem plet, means for actuating said jnessure-ln'lr, a pair el swinging jaws arranged to copcrate with said templet, a pair of toggles, :"or raising the jaws into Contact with said templet, supports arranged intermediate of and pivotally engaging both the toggles and jaws, adjusting-means independent oi the supports for regulating the pressure of the jaws against the templct. and means for imparting movement tp said toggles.

4. In a bending machine. the combination with the main frame, of a templet arranged in said frame, a` pressure-bar for supporting and clamping the metal sheets ag-.linst said templet, means for moving said pressure-bar against said templet, means for regulating the introduction of the metal sheets into the machine, a pair of swinging jaws 'arranged to coperate with said t'emplet. adjusting means independent of the togglcs for controlling the pressure of the jaws against the templet. a pair of toggles for elevating the jaws into contactwith said templet, and means for actuating said toggles.

5. In a bending machine. the combination with the main frame, of a. templet arranged in said frame, a pressure-bar i'or supporting 4and clamping the metal sheets against said tcmplet, means for moving said pressure-bar h@ inmducfm; sf meia heef into She ais 2nd day of February, A, Dl one boumachine, a pail' @if swinging jaws arranged sand nine hundred ami fourteen. g L A do mopexatewaa and empet., medm ar cnw Y, ,Humains man? sur@ for varying tige trave! of sai jaws, and Witnesses:

. means for actuaing aid tagges. F. W. Wombat?,

En witness whemei, l Enne 'xeretm @et 3. A. Muz'mmv- 

